diff --git a/apps/mappingmanagement/web/src/test/java/org/onosproject/mapping/web/MappingsWebResourceTest.java b/apps/mappingmanagement/web/src/test/java/org/onosproject/mapping/web/MappingsWebResourceTest.java
new file mode 100644
index 0000000..79290d3
--- /dev/null
+++ b/apps/mappingmanagement/web/src/test/java/org/onosproject/mapping/web/MappingsWebResourceTest.java
@@ -0,0 +1,487 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.mapping.web;
+
+import com.eclipsesource.json.Json;
+import com.eclipsesource.json.JsonArray;
+import com.eclipsesource.json.JsonObject;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeMatcher;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.osgi.TestServiceDirectory;
+import org.onlab.packet.IpPrefix;
+import org.onlab.rest.BaseResource;
+import org.onosproject.codec.CodecService;
+import org.onosproject.codec.impl.CodecManager;
+import org.onosproject.mapping.DefaultMappingKey;
+import org.onosproject.mapping.DefaultMappingTreatment;
+import org.onosproject.mapping.DefaultMappingValue;
+import org.onosproject.mapping.MappingEntry;
+import org.onosproject.mapping.MappingId;
+import org.onosproject.mapping.MappingKey;
+import org.onosproject.mapping.MappingService;
+import org.onosproject.mapping.MappingTreatment;
+import org.onosproject.mapping.MappingValue;
+import org.onosproject.mapping.actions.MappingAction;
+import org.onosproject.mapping.actions.MappingActions;
+import org.onosproject.mapping.addresses.MappingAddress;
+import org.onosproject.mapping.addresses.MappingAddresses;
+import org.onosproject.mapping.codec.MappingActionCodec;
+import org.onosproject.mapping.codec.MappingAddressCodec;
+import org.onosproject.mapping.codec.MappingEntryCodec;
+import org.onosproject.mapping.codec.MappingInstructionCodec;
+import org.onosproject.mapping.codec.MappingKeyCodec;
+import org.onosproject.mapping.codec.MappingTreatmentCodec;
+import org.onosproject.mapping.codec.MappingValueCodec;
+import org.onosproject.mapping.instructions.MappingInstruction;
+import org.onosproject.net.DefaultDevice;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.rest.resources.ResourceTest;
+
+import javax.ws.rs.client.WebTarget;
+import java.util.Map;
+import java.util.Set;
+
+import static org.easymock.EasyMock.anyObject;
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.replay;
+import static org.easymock.EasyMock.verify;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.junit.Assert.assertThat;
+import static org.onosproject.mapping.MappingStore.Type.MAP_DATABASE;
+import static org.onosproject.mapping.instructions.MappingInstructions.multicastPriority;
+import static org.onosproject.mapping.instructions.MappingInstructions.multicastWeight;
+import static org.onosproject.mapping.instructions.MappingInstructions.unicastPriority;
+import static org.onosproject.mapping.instructions.MappingInstructions.unicastWeight;
+
+/**
+ * Unit tests for Mappings REST APIs.
+ */
+public class MappingsWebResourceTest extends ResourceTest {
+
+    private static final String IPV4_STRING_1 = "1.2.3.4";
+    private static final String IPV4_STRING_2 = "5.6.7.8";
+    private static final String PORT_STRING = "32";
+    private static final IpPrefix IPV4_PREFIX_1 =
+            IpPrefix.valueOf(IPV4_STRING_1 + "/" + PORT_STRING);
+    private static final IpPrefix IPV4_PREFIX_2 =
+            IpPrefix.valueOf(IPV4_STRING_2 + "/" + PORT_STRING);
+
+    private static final int UNICAST_WEIGHT = 1;
+    private static final int UNICAST_PRIORITY = 1;
+    private static final int MULTICAST_WEIGHT = 2;
+    private static final int MULTICAST_PRIORITY = 2;
+
+    private static final int DIFF_VALUE = 99;
+
+    private static final String ID = "id";
+
+    private static final String PREFIX = "mappings";
+
+    private final MappingService mockMappingService = createMock(MappingService.class);
+
+    private final Map<DeviceId, Set<MappingEntry>> mappings = Maps.newHashMap();
+
+    private final DeviceService mockDeviceService = createMock(DeviceService.class);
+    private final DeviceId deviceId1 = DeviceId.deviceId("1");
+    private final DeviceId deviceId2 = DeviceId.deviceId("2");
+    private final Device device1 = new DefaultDevice(null, deviceId1, Device.Type.ROUTER,
+            "", "", "", "", null);
+    private final Device device2 = new DefaultDevice(null, deviceId2, Device.Type.ROUTER,
+            "", "", "", "", null);
+
+    private final MockMappingEntry mapping1 = new MockMappingEntry(deviceId1, 1);
+    private final MockMappingEntry mapping2 = new MockMappingEntry(deviceId1, 2);
+
+    private final MockMappingEntry mapping3 = new MockMappingEntry(deviceId2, 3);
+    private final MockMappingEntry mapping4 = new MockMappingEntry(deviceId2, 4);
+
+    private final Set<MappingEntry> mappingEntries = ImmutableSet.of(mapping1, mapping2, mapping3, mapping4);
+
+    /**
+     * Constructs a mappings web resource test instance.
+     */
+    public MappingsWebResourceTest() {
+        super(ResourceConfig.forApplicationClass(MappingsWebApplication.class));
+    }
+
+    /**
+     * Mock class for a mapping entry.
+     */
+    private static class MockMappingEntry implements MappingEntry {
+        final short UNIQUE_SHORT = 2;
+        final DeviceId deviceId;
+        MappingKey key;
+        MappingValue value;
+        final long baseValue;
+
+        MockMappingEntry(DeviceId deviceId, long id) {
+            this.deviceId = deviceId;
+            this.baseValue = id * 100;
+        }
+
+        @Override
+        public MappingId id() {
+            final long id = baseValue + 11;
+            return MappingId.valueOf(id);
+        }
+
+        @Override
+        public short appId() {
+            return UNIQUE_SHORT;
+        }
+
+        @Override
+        public DeviceId deviceId() {
+            return deviceId;
+        }
+
+        @Override
+        public MappingKey key() {
+            return key;
+        }
+
+        @Override
+        public MappingValue value() {
+            return value;
+        }
+
+        @Override
+        public MappingEntryState state() {
+            return MappingEntryState.ADDED;
+        }
+    }
+
+    /**
+     * Populates some mappings used as testing data.
+     */
+    private void setupMockMappings() {
+        MappingAddress address1 = MappingAddresses.ipv4MappingAddress(IPV4_PREFIX_1);
+        MappingAddress address2 = MappingAddresses.ipv4MappingAddress(IPV4_PREFIX_2);
+
+        MappingInstruction unicastWeight1 = unicastWeight(UNICAST_WEIGHT);
+        MappingInstruction unicastPriority1 = unicastPriority(UNICAST_PRIORITY);
+        MappingInstruction multicastWeight1 = multicastWeight(MULTICAST_WEIGHT);
+        MappingInstruction multicastPriority1 = multicastPriority(MULTICAST_PRIORITY);
+
+        MappingInstruction unicastWeight2 = unicastWeight(UNICAST_WEIGHT + DIFF_VALUE);
+        MappingInstruction unicastPriority2 = unicastPriority(UNICAST_PRIORITY + DIFF_VALUE);
+        MappingInstruction multicastWeight2 = multicastWeight(MULTICAST_WEIGHT + DIFF_VALUE);
+        MappingInstruction multicastPriority2 = multicastPriority(MULTICAST_PRIORITY + DIFF_VALUE);
+
+        MappingKey key1 = DefaultMappingKey.builder()
+                .withAddress(address1)
+                .build();
+
+        MappingTreatment treatment1 = DefaultMappingTreatment.builder()
+                .add(unicastWeight1)
+                .add(unicastPriority1)
+                .add(multicastWeight1)
+                .add(multicastPriority1)
+                .withAddress(address1)
+                .build();
+
+        MappingAction action1 = MappingActions.noAction();
+
+        MappingValue value1 = DefaultMappingValue.builder()
+                .add(treatment1)
+                .withAction(action1)
+                .build();
+
+        MappingKey key2 = DefaultMappingKey.builder()
+                .withAddress(address2)
+                .build();
+
+        MappingTreatment treatment2 = DefaultMappingTreatment.builder()
+                .add(unicastWeight2)
+                .add(unicastPriority2)
+                .add(multicastWeight2)
+                .add(multicastPriority2)
+                .withAddress(address2)
+                .build();
+
+        MappingAction action2 = MappingActions.forward();
+
+        MappingValue value2 = DefaultMappingValue.builder()
+                .add(treatment2)
+                .withAction(action2)
+                .build();
+
+        mapping1.key = key1;
+        mapping2.key = key2;
+        mapping3.key = key1;
+        mapping4.key = key2;
+
+        mapping1.value = value1;
+        mapping2.value = value2;
+        mapping3.value = value1;
+        mapping4.value = value2;
+
+        final Set<MappingEntry> mappings1 = Sets.newHashSet();
+        mappings1.add(mapping1);
+        mappings1.add(mapping2);
+
+        final Set<MappingEntry> mappings2 = Sets.newHashSet();
+        mappings2.add(mapping3);
+        mappings2.add(mapping4);
+
+        mappings.put(deviceId1, mappings1);
+        mappings.put(deviceId2, mappings2);
+    }
+
+    /**
+     * Sets up the global values for all the tests.
+     */
+    @Before
+    public void setUpTest() {
+
+        // Register the services needed for the test
+        final CodecManager codecService = new CodecManager();
+        codecService.activate();
+        codecService.registerCodec(MappingEntry.class, new MappingEntryCodec());
+        codecService.registerCodec(MappingAddress.class, new MappingAddressCodec());
+        codecService.registerCodec(MappingInstruction.class, new MappingInstructionCodec());
+        codecService.registerCodec(MappingAction.class, new MappingActionCodec());
+        codecService.registerCodec(MappingTreatment.class, new MappingTreatmentCodec());
+        codecService.registerCodec(MappingKey.class, new MappingKeyCodec());
+        codecService.registerCodec(MappingValue.class, new MappingValueCodec());
+        ServiceDirectory testDirectory =
+                new TestServiceDirectory()
+                        .add(MappingService.class, mockMappingService)
+                        .add(DeviceService.class, mockDeviceService)
+                        .add(CodecService.class, codecService);
+
+        BaseResource.setServiceDirectory(testDirectory);
+    }
+
+    /**
+     * Cleans up and verifies the mocks.
+     */
+    @After
+    public void tearDownTest() {
+        verify(mockMappingService);
+    }
+
+    public static class MappingEntryJsonArrayMatcher extends TypeSafeMatcher<JsonArray> {
+
+        private final MappingEntry mapping;
+        private String reason = "";
+
+        MappingEntryJsonArrayMatcher(MappingEntry mappingValue) {
+            mapping = mappingValue;
+        }
+
+        @Override
+        protected boolean matchesSafely(JsonArray json) {
+
+            boolean mappingFound = false;
+
+            for (int jsonMappingIndex = 0; jsonMappingIndex < json.size();
+                 jsonMappingIndex++) {
+
+                final JsonObject jsonMapping = json.get(jsonMappingIndex).asObject();
+
+                final String mappingId = Long.toString(mapping.id().value());
+                final String jsonMappingId = jsonMapping.get(ID).asString();
+                if (jsonMappingId.equals(mappingId)) {
+                    mappingFound = true;
+                    assertThat(jsonMapping, matchesMapping(mapping));
+                }
+            }
+
+            if (!mappingFound) {
+                reason = "Mapping with id " + mapping.id().toString() + " not found";
+                return false;
+            } else {
+                return true;
+            }
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText(reason);
+        }
+    }
+
+    /**
+     * Hamcrest matcher for mapping entry.
+     */
+    public static final class MappingEntryJsonMatcher
+            extends TypeSafeMatcher<JsonObject> {
+
+        private final MappingEntry mappingEntry;
+        private String reason = "";
+
+        /**
+         * A default constructor.
+         *
+         * @param mappingEntry mapping entry
+         */
+        private MappingEntryJsonMatcher(MappingEntry mappingEntry) {
+            this.mappingEntry = mappingEntry;
+        }
+
+        @Override
+        protected boolean matchesSafely(JsonObject jsonObject) {
+            // check mapping id
+            final String jsonId = jsonObject.get("id").asString();
+            final String mappingId = Long.toString(mappingEntry.id().value());
+
+            if (!jsonId.equals(mappingId)) {
+                reason = "id " + mappingEntry.id().toString();
+                return false;
+            }
+
+            // check device id
+            final String jsonDeviceId = jsonObject.get("deviceId").asString();
+            final String deviceId = mappingEntry.deviceId().toString();
+            if (!jsonDeviceId.equals(deviceId)) {
+                reason = "deviceId " + mappingEntry.deviceId();
+                return false;
+            }
+
+            // check state
+            final String jsonState = jsonObject.get("state").asString();
+            final String state = mappingEntry.state().name();
+            if (!jsonState.equals(state)) {
+                reason = "state " + mappingEntry.state().name();
+                return false;
+            }
+
+            return true;
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText(reason);
+        }
+    }
+
+    /**
+     * Factory to allocate a mapping matcher.
+     *
+     * @param mapping mapping object we are looking for
+     * @return matcher
+     */
+    private static MappingEntryJsonMatcher matchesMapping(MappingEntry mapping) {
+        return new MappingEntryJsonMatcher(mapping);
+    }
+
+    /**
+     * Factory to allocate a mapping array matcher.
+     *
+     * @param mapping mapping object we are looking for
+     * @return matcher
+     */
+    private static MappingEntryJsonArrayMatcher hasMapping(MappingEntry mapping) {
+        return new MappingEntryJsonArrayMatcher(mapping);
+    }
+
+    /**
+     * Tests the result of the rest api GET when there are no mappings.
+     */
+    @Test
+    public void testMappingsEmptyArray() {
+        expect(mockMappingService.getAllMappingEntries(anyObject()))
+                .andReturn(null).anyTimes();
+        replay(mockMappingService);
+        final WebTarget wt = target();
+        final String response = wt.path(PREFIX + "/db").request().get(String.class);
+        assertThat(response, is("{\"mappings\":[]}"));
+    }
+
+    /**
+     * Tests the result of the rest api GET when there are active mappings.
+     */
+    @Test
+    public void testMappingsPopulateArray() {
+        setupMockMappings();
+        expect(mockMappingService.getAllMappingEntries(anyObject()))
+                .andReturn(mappingEntries).once();
+        replay(mockMappingService);
+        final WebTarget wt = target();
+        final String response = wt.path(PREFIX + "/db").request().get(String.class);
+        final JsonObject result = Json.parse(response).asObject();
+        assertThat(result, notNullValue());
+
+        assertThat(result.names(), hasSize(1));
+        assertThat(result.names().get(0), is("mappings"));
+        final JsonArray jsonMappings = result.get("mappings").asArray();
+        assertThat(jsonMappings, notNullValue());
+        assertThat(jsonMappings, hasMapping(mapping1));
+        assertThat(jsonMappings, hasMapping(mapping2));
+        assertThat(jsonMappings, hasMapping(mapping3));
+        assertThat(jsonMappings, hasMapping(mapping4));
+    }
+
+    /**
+     * Tests the result of the rest api GET with a device ID when there are
+     * no mappings.
+     */
+    @Test
+    public void testMappingsByDevIdEmptyArray() {
+        expect(mockDeviceService.getDevice(deviceId1)).andReturn(device1);
+        expect(mockMappingService.getMappingEntries(MAP_DATABASE, deviceId1))
+                .andReturn(null).anyTimes();
+        replay(mockDeviceService);
+        replay(mockMappingService);
+
+        final WebTarget wt = target();
+        final String response = wt.path(PREFIX + "/" + deviceId1 + "/db")
+                .request().get(String.class);
+        assertThat(response, is("{\"mappings\":[]}"));
+    }
+
+    /**
+     * Tests the result of the rest api GET with a device ID when there are
+     * active mappings.
+     */
+    @Test
+    public void testMappingsByDevIdPopulateArray() {
+        setupMockMappings();
+        expect(mockDeviceService.getDevice(deviceId2)).andReturn(device2);
+        expect(mockMappingService.getMappingEntries(MAP_DATABASE, deviceId2))
+                .andReturn(mappings.get(deviceId2)).once();
+        replay(mockDeviceService);
+        replay(mockMappingService);
+
+        final WebTarget wt = target();
+        final String response = wt.path(PREFIX + "/" + deviceId2 + "/db")
+                .request().get(String.class);
+
+        final JsonObject result = Json.parse(response).asObject();
+        assertThat(result, notNullValue());
+
+        assertThat(result.names(), hasSize(1));
+        assertThat(result.names().get(0), is("mappings"));
+        final JsonArray jsonMappings = result.get("mappings").asArray();
+        assertThat(jsonMappings, notNullValue());
+        assertThat(jsonMappings, hasMapping(mapping3));
+        assertThat(jsonMappings, hasMapping(mapping4));
+    }
+}